Armrest box



FIG. 1 is a rear and top perspective view of an armrest box, showing my new design;

FIG. 2 is a front and bottom perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines in the figures illustrate portions of the armrest box that form no part of the claimed design. 

CLAIM The ornamental design for an armrest box, as shown and described. 